Best 4412 carb?

[PereaRacing20]

In the market for a holley 4412 carb. Have ran rochesters for 4 or 5 years now and want to switch over to the 4412. All steel engines, 360 ci max, 9 1/2:1 compression. What's the best carb out there?

[Racer96m]

In 2012 I ran a VDL 4412 and was very happy with the performance. The Holley Ultra HP 4412 is the way to go now if its legal for you to use.

Dave

[PereaRacing20]

Holley – Venturi: 1.376 maximum; Base plate bore: 1.690 maximum; Booster vertical dimension:0.430 minimum; Booster legs will show all casting part lines; Booster leg width: 0.260 minimum;Booster outer dimension: 0.605 minimum; Booster inside dimension: 0.385 maximum; Thicknessof throttle blade and shaft: 0.190 minimum; Holley choke horn must remain.

[fastford]

if you can run e85, you can buy a do it yourself conversion kit from e85carbs.com. I built one of these a while back out of a bone stock 4412 and it ran great, don't know your rules, but if you can run e85 , this is the way to go IMO.

[fastford]

never put it on a dyno, but it was obvious it gained power. BUT ive been told by a reputable source that did test it on a dyno, that this set up was good for at least 10% gain and I defiantly believe it. e85 is $1.57 a gal down here now and it loves compression. that's a lot better than $8.00 a gal for racing fuel. only thing is, if your gone run it, buy a tester , there real strict on it being what its suppose to be, but its easy to adjust your self.

[50j]

SCD has good advise. First hand testing is always best IMO. The custom built carb will be better if it's done by a good builder because all the parts will be correct and the builder can catch things that may be overlooked by someone that doesn't do it every day or the builder will probably know things that can be done within the rules to get more power out of it. The 4412 "conversion kits" leave a lot to be desired, and there are fuel restrictions that a kit doesn't fix not to mention some other issues. Having one built doesn't cost all that much more.

[fastford]

Ic.

I don't race to save money and I don't bolt stuff on and guess or hope it was a improvement.

Racing around me is taken way way more serious than that. I wish it wasn't but it is.

well ok BIG money , maybe your having more fun than me, ill keep putting my old home made junk together and try to keep racing. ive always said when I cant build it my self or about go broke trying to race, Ill quit....and to the post above you, I guess one would have to define what the merits of a good rebuilder would be. I was trying to give my opinion to the original poster , that's all........

[powerslide]

Maybe he will send it to you and you can test it for him...

[let-r-eat]

BLP makes a good 4412 carb.

[rcstreet1]

never put it on a dyno, but it was obvious it gained power. BUT ive been told by a reputable source that did test it on a dyno, that this set up was good for at least 10% gain and I defiantly believe it. e85 is $1.57 a gal down here now and it loves compression. that's a lot better than $8.00 a gal for racing fuel. only thing is, if your gone run it, buy a tester , there real strict on it being what its suppose to be, but its easy to adjust your self.

Loves compression?? You do know there's a Compression limit on e85 right?

[turtle1hp]

Call Brandon Buhler at TCC. Total Custom Carbs & Dyno. He builds to your needs and pulls it on the dyno before it leaves, to make sure it's up to spec. Even if you don't buy from him, he can point you in the right direction. He specializes in circle track applications. He is a wealth of knowledge and is willing to share it to help people. Shop 225-772-7579 Mobile 225-806-4487

[50j]

I would suggest calling JDR also.

[fastford]

Loves compression?? You do know there's a Compression limit on e85 right?

I know of a 12.5:1 steel head engine that is running great on it, also know of a 14:1 Harley davison that is running very good on it, that's as high of comp that I've seen, but I really don't know what the limit or max would be.

[SLM98]

BLP carbs will air flow the best. The fuel curve is also important so it doesn't go rich on top end. As far as compression on E85, I built a 632BBC that was 13-1 ran on pump E85. Worked out great made 980hp

[fastford]

yea SLM98, a lot of people thinks that "85" stands for octain , that Harley a friend of mine I mentioned above had to buy 114 racing fuel to just ride it to town, and it still ran hot if you was not careful. Converted the carb to e85 and played with timing and now he can ride it any where and it stays cool and he thinks it makes more power. all for a $1.65 a gallon.